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我单位清理水仓淤泥使用ＰＮＬ型泥浆泵。该泵使用一段时 间后，护板结合部位的轴套直径变小，护板孔径变大（原设计间隙不大于０．２ｍｍ，而磨损后最大间隙为４ｍｍ），当泥浆泵工作时，由于在缝隙处大量进气，所以无法从吸泥口吸泥浆。原结构如图１所示。 １改进方案 （１
My unit clean silo sludge using PNL type mud pump. After the pump is used for a period of time, the diameter of the bushing of the joint at the guard plate becomes smaller and the aperture of the guard plate becomes larger (the original design gap is not larger than 0.2 mm and the maximum gap after the wear is 4 mm). When the mud pump is in operation, Gap at a large number of intake, so suction can not suck mud from the mouth. The original structure shown in Figure 1. 1 improvement program (1